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8 Coexistence

nRF7002 has a highly configurable coexistence hardware to help mitigate interference between WLAN and

Bluetooth LE/IEEE 802.15.4 devices (Bluetooth LE, Thread, Zigbee).

A Packet Traffic Arbitration (PTA) module, connected to the CH logic function, facilitates the mitigation of

various interference scenarios through a highly-programmable fabric. The coexistence hardware enables

flexible output signals that support interface configurations like 3-wire and 4-wire. The primary schemes

supported are:

• Shared Antenna mode – The PTA makes priority decisions, controls the switch between Bluetooth

LE/IEEE 802.15.4 and Wi-Fi. The PTA also grants TX/RX requests from the Bluetooth LE/IEEE 802.15.4

device. Only one interface, either Bluetooth LE/IEEE 802.15.4 or or Wi-Fi is connected to the antenna

at any time.

• Separate Antenna mode – The PTA makes priority decisions, granting TX/RX requests from Bluetooth

LE/IEEE 802.15.4. Each interface is permanently connected to its own antenna.

The following figure shows the architecture of the coexistence hardware with details about the PTA control

lines.

nRF7002

Wi-Fi

PTA

COEX

Ctrl

Logic

Ant

Switch

Control

Host I/F

COEX HW

COEX_GRANT

COEX_STATUS0

COEX_REQ

SW_CTRL0

COEX_STATUS1/

SW_CTRL1

Figure 13: Coexistence hardware architecture

4486_184 v1.0

NRF7002-QFAA-R7 Fiches technique(PDF) 22 Page - Nordic Semiconductor